Improvement in coffee-pots



J. HARTMAN, Jr. Coffee-P013..

" No.- 211,36`. VPatent-edlem. 7, 1879.

, WY f WMM @mf N. PEERS. PNOI'D-LITHOGRAFl-IER, WASHINGTON. (1C.

UNITED STATES PATENT OEEIcE.

JOHN HARTMAN, JR., OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN COFFEE-POTS.

Specication forming part of Letters Patent No. 211,236, dated January 7', 1879; application filed January 5, 1878.

To all whom it may concern:

Be it known that I, JOHN HAETMAN, J r., of the city and county of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in Coffee-Pots, which improvement is fully set forth in the following specification and the accompanying drawings,

in which- Figure l is a plan view of :my improved coffee-pot, the cover being removed. Fig. 2 is a vertical section at the broken line .r m of Fig. l. Fig. 3 is a section of an upper part of the detachable section B, showing one of the bearings g.

Like letters of reference in all the figures indicate the same parts.

My invention relates to that class of coffeepots in which the ground coffee is placed in a decocting-chamber, above one which receives the decoction as it passes from the former chamber; and the nature of my invention consists in the combination of' an adjustable perforated diaphragm, adjusting vertical screw- -rod, and cross-bar (in which it turns freely,

while its lower end, by a screw-connection with the diaphragm, adjusts the latter) with the decocting-chamber provided with a perforated loose bottom, as hereinafter more fully described.

In reference to the drawings,`A represents the lower section of my improved coffee-pot, into which the decoction passes as it is formed in the upper and detachable section,

B. The latter section is held in position by means of the annular bead b, which rests upon the upper edge of the section A, leaving below the perforated bottom O a chamber, a, in the lower section, of sufficient capacity to hold the maximum quantity of' decoction that may at any time be made in the upper chamber, a. The section B has an inwardly-projecting annular lip, d, upon which the perforated bottom O rests, which has a loose t, so as to be readily detached for the purpose of cleaning it and the decocting-chamber-ct.

D is a perforated diaphragm, adjustable in the chamber a to any desired height. It has a permanent spider, e, which is provided with a central vertical tube, Gr.

H is a vertical screw-rod, which works in a lated by means of the knob f, the ends of the bar being placed in the bearings g g, in opposite sides of the section B. The bearings are made open below, as represented in Figs. 2 and 3, for conveniently removing and att-aching the bar I.

Instead of the screw-rod H, a vertical rack or racks on the inner surface of the wall of the section B and pawls may be used, or any other suitable device for the adjustment of the diaphragm D.

The operation is as follows: The ground coffee is placed in the decoctingchamber a', and the diaphragm D brought into its place, the adjusting screw-rod H having been previously screwed down, so as to conveniently connect the ends of the bar I with its bearings g g. Then the diaphragm is forced down upon the ground coffee by operating the screw-rod, and the proper amount of' water for making the decoction is poured into the chamber a', and passes through the perforated diaphragm and percolates through the coffee, whereby its essence is extracted, and passes through the perforated bottom C into the receiving-chamber a. During` the process the mass of ground coffee is so swelled that it` automatically presses itself' between the bottom G and diaphragm D with sufficient force to squeeze out all the decoction into the receiving-chamber a, and hence the usual waste which takes place by a large amount of the decoction remaining in the grounds is avoided.

I claim as my invention- In combination with a decocting-chamber having bearin gs g g and perforated loose bottom C, the perforated diaphragm D, having a tube, Gr, the diaphragm being held in place by means of the screw-rod H and rigid bar I, substantially as and for the purpose set forth.

JOHN HARTMAN, JR.

Witnesses:

THOMAS J. BEWLEY, `STEPHEN UsTIeK. 

